What Is An Antigen?

What is an antigen? An antigen is an allergen like smoke, milk, or pollen after it gets into your body. Once an allergen gets into your body, the allergen becomes an antigen. It's just a different term...

Once an allergen gets into your body, the allergen becomes an antigen. It's just a different term for the same thing. The thing that you are reacting to, whether it's smoke, wool, milk, or pollen is the allergen. Once it gets into your body, we call it an antigen. Your body responds by defending itself. It is like the policeman who confronts the robber; we call it the antibody. Immunoglobulin E is a classic marker for an allergy. That's one of your antibody type cells. The antibodies are the cops. Pollens are the robbers. An IgE level is something that tells us that person has an allergy versus some other disorder like cancer. Suppose we are not sure whether you are having tuberculosis or allergy. Well when we do an IgE level. If the IgE is elevated, we assume there is an allergic disorder, not an infectious one.

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